Carbureter.



UNITED sTATEs .PATENT ornron DAVIS BARNAR'D, or Los ANGELES, oALIroRN'I'A.

' I CARBURET'EB.

Specification of Letters Patent.

Patented May 28', '19125.

Application led September 9,1910. -SerialNa 581,242. I

To ad whom t may concern:

Be it known that I," DAVIS -BARNAIRM a citizenof the vUnited States, residing at Los Angeles, California, have invented a new and -useful Carbureter, of which the .following is a specification.

Among the objects of this invention are to provide a carbureter that will supply vaporized liquid fuel to gas engines in a more eco-` nomical manner and in a more uniform and perfect manner than of its class.

The invention accomplishes the economical and eihcient feeding of fuel to the enl5 gine by means of an arrangement whereby the air fed to the engine is always saturated with 'vapor to the' same extent and in required exactv proportions, the regulation of theamountof fuel.y supplied to the engine being accomplished (solely byincreasing and diminishing the Volume ofthe saturated air fed to the engine and not by varying the degree of saturation, that is to say, each cubicl The invention consists in the various parts, combinations, and details of construction herelnafter descrlbed 1n connection with the accompanying drawings and4 then deinitely point out in generic and also in more specific claims.

v Referring to the accompanying drawings which illustrate the invention, Figure 1 is a side elevation of `the complete carbureter showing also a fragment of the means for operating the same and a portion of the feed pipe of the engine to which the carbureter is attached. Fig. 2 -is a top plan view of Fig. 1 the fragment of the engine intake pipe being omitted. Fig'. 3 is a mid-section on line X---X5 of Fig. 2. Fig. 4 is a cross is done by other devicessection' on line -X- i* of Fig. '2. Fig. 4a is an enlarged sectional detail of aportion of Fig. v4. Fig..5is areproduction of the upper portion of Fig.;3 on an enlarged scale showing the operative parts in another position. Fig. 6 is a top plan view partly in' section of the lcarbureter chamber a portion of which is broken away to show interior construction. `Fig. 7 is afcross section of Fig. 6 on' line X7-X7 thereof. Fig.8 is an en' larged longitudinal section of the -fuelfeeding plunger brokenv to contract the view.

Referring in detail to the drawings,fthe carbureter chamberl is inclosed by the carbureting cylinder2, said cylinder being provided in its upper side with a carbureted air supply opening 3 and in Aits lowerside with an a1r` inlet opening 4. Said openings 3 and` 4 (see Fig. 7) are in the form ofslots eX- tending langthwise of `the cylinder 2and are opened and closed at any desired extent `by means of 'a piston sleeve 5 vhaving a partial cross wall 6 by which said piston sleeve is operated by means of the piston rod 7 Within the carbureting chamber lis a liquid supply tube 8 having in its upper side a supply slot or narrow slit 9 located between the openings 3 and 4. Said tube .8 projects through a head 11 which closes one end of the carbureting chamber l, andoutside of said chamber said. tube is provided .with a liquid inlet pipe 12, said tube 8 extending a little distance to the left of the lpoint where the supply pipe 12 communi-,1

cates therewith. Within the tube 8l is a hollow plunger 13 (see Fig. 8) which extends from end to end thereof and is provided. with a reduced portion. 14 always opposite the fuel supply pipe 12. Said reduced portion 14 is provided with a series of inlet holes 15. Plunger 13 is provided withl an open inner end but is made solid at its other end where it 'extends outside of the tube 8. This construction adapts the plunger 13 to conduct the liquid from the supply tube'12 to the slotted end of the tube 8 Where the fuel is drawn -from the outlet slot 9 in the form of spray bythe suction of the engine. The opening of the outlet 9 is regulated'by adjusting the `position of the plunger 13 within the tube 8 in a manner -that will be hereinafter fully explained.

soY

Means will lnon? be described .for positively regulating the relatif/,e movement between, and thereby harmonize the operation et', the piston rod 7 and theplunger 8. For lthis purpose an upright guide 17 is secured in the cross Wall 6, being provided with a` shoulder 18 on one side of said-Wall and a nut 19 on the other side of said `wall 6. 21

is a stalling box mounted In thehead 11 through which rod lv-projects. .Said rod 7 is desirably provided with a knu'rled flange 22 for rotating the same to adjust vits posi;`

tion and therefore the position of the piston' sleeve 5 carried thereby to simultaneously regulate the width. of opening of the slots and 4. `When the desired adjustment vis obtained, a lock nut 23 is screwed down upon the guide 7 to hold the same in the adl. 28, `lVithin said" nut 28 operates lan exterjusted position. 24 is a stop arm secured to the top, of the cylinder. The adjustable guide 17 isprovided with a slot or way 25 within which slides a cross head 26 to Which are pivot-ed the'orks 27 carried by a nut nally threaded rotatable sleeve 2 9 carried by a lever 31, which 1s connected with the plunger 13 to' operate the same and'regulate the Aextent of opening of the slot 9.

1n order to hold the plunger snugly up against the top of tube 8 to insure the.

proper closing of slot 9, I provide a leaf spring (see Fig. 8) whichris secured in a block 55 that closes the end of tube 8, the *free end of said spring at all times extending within the plunger 13 and pressing against the upper wall thereof to hold the same closely to the top of the tube 8.

The right hand end of the carbureter eylinder 2 may be closed by a head 56. A brace 57 is. shown, the central portion et' which is unitary with or secured to the head 56 and the ends of which brace extend around vto and are secured upon the sides of the tloat chamber 51.

is a tube .tor supplying the mixture to the engine` said tube being desirably furnishedwith the attaching flange 59.

liever 31 terminates at its -lovver end in forks 32 each of said forks being pivoted at 831e fixed arms 84, lilach of said forks 82 are provided with short upwardly extending arms S5 which are pivoted to links 236, the other ends olI said 'links being pivolally connected to lllc outer end ot the plunger 13. llunger 1?) (see Fig. 5l) is provided vwith a head 37 haring trunnions 217 (see Fig, 5) journaled into the links 3G.

The threaded end of the plunger 13 projects through saidcross head and is there pro` vided With an loperating nut 39 4and lock nut 41 by which itis adjusted as desired and then securedin the adjusted position The levers17 andl 31 are Inovedas desired by means'of a forked rod 42, the forks of which fpass astride the guide 17 andare means .of a pin 43. Said rod 42 leads to any suitable control'lever (not shown) for operating the same.

The liquid fuel Sppued through s inlet 44 controlled -by a .valve 45 Whichis regulated by a Walking'beam 46 the ends of. said beam being/connected to ioats 47l by means of eye bolts 48. Said walking beam operates in a cylindrical housing 49.

vThe floats 47 are each located iny a .lioat 'chamber 51 having a cover 52. The bottoms 51 of said float chambers are united iny a liquid-tight manner with said housing 49, and are provided with central apertures 51 through which extends the eye-bolt 48. Valve stem 45 is provided with a head 45 having a bore 45 (Fig/4a) With flared ends to provide for a tilting movement of walking beam 46. 46 are collarsixed to said walking beaml on each side of head 45 to keep the walking beam in place. The eyebolts extend up through the loats 47 'pivoted to the lower portion. thereof by". 'l

and are adjustable by means of nuts 48.

A brace 53 may be secured at each end to one of the caps and may be fastened down between its ends to the top of the -carbureter cylinder 2 as shown.

The usual choker 61 may be provided to regulate the air intake.

Sleeve 29 is provided with a milled head 29 .for rotating the same. Said sleeve may be held on to lever 31 by a screw 31 -(Fig. 3) in the end o1 said lever. v

@wing to the fact that engines differ both in respect to length ot stroke and also in respect to size of bore it is necessary to provide means of adjustment that will furnish a greater or less amount of properly carburcted air for eachrharge. lt is necessary tirst to adjust properly for the. mininium or low speed of the engine when the saine is running without load. .ln order to do thisv` with the operating rod 42 in the right hand position` and the guide 17 abutting against the stoparin 24. the pivot in guide block 26 is brought. vertically above stationary pivot and the piston rod 7 is then rotated by means ot' flange 22 in a direction lto draw back the cylindrical piston sleeve 5, To open the slots 3 and 4 a suit-- able distance. say one-fourth oiE an inch. lo supply the proper volume ot carbureted air to the engine when ruiming withoutload. plunger 13 is now rotated by means of the milled head on the end thereof until said plungeris'withdrawn sulhciently tb expose the required length of fuel. supplyslot 9 necessary -toproj'ierly carburet the quantity of air which will be'fed` toathe engine through the airfeeding openings when the same have been opened to the extent alreadj7 described.- The rod 42 is now manually` moved tothe left until it and the adjusting mechanism occupy the position shown in full lines in Fig 5, and while'th'e parts are in .'tliis position the threaded sleeve 29 is vrotated to move the forkednut28 together with the block 26 in `guide 17-*up` or down until the lever 3l is connected withl the "guide 1,7 in such a manner that the moving ofsaid guide' a givenamountwill affonda prop er proportional movement 'of the lever.-

It :will be 'i observed that making the' adjustment lastA describedv -willfin no 'wi'se/ affect.

the adjustmentof the air openings and' fuel supply slot when they arein-.theoriginal jiosition-l An ladjustment is. made'ffor the enginek when running at'the minimum speed to at that time .mix thel fuell vand airl in proper proportions, and another adjustment is made for-"the engine4 when running at` maximum speedto at that time mix the f uel and air in' proper/proportions and the, i'esultis that neitherof the vadjustments interferes with the other, and the exact -desired ratio of fuel to air is maintained at all intermediate positionsuof the levers and parts connected theiewit-hf` Owing tothedraft slots 3 and 4 being of uniform width throughout their entire length and'the fuel feeding slot 9 also be'- nary needle-oontro'lled tapering feed' opening-and. to provide instead the feed slot 9 of uniform width before any satisfactory .adjustment could be effected. The combination of a fuel feed having a feed slot of uniform Width with like slots for the air draft, and means movable'lengthwise ofall these slots to control the openings thereof, constitutes one of the mainA features of -this invention.,

When the device is in theretracted 4position shown in Fig. 'l and thel lever 32 and ,sleeve 29 -in the upright position and parallel to each other, the vertical adjustment of thefork 28 and block 26 do not affect the 'relative position of the. parts in supplying the smallest amount of fuel, the operating rod 42 is retracted' a given amount fand the j rbd 7 and plunger 13 moved with-it a certain extent, if. said operating4 rod were moved twice said given amount the saine proportions movement would still be maintained between tlie .r. 0d 7 andhollowplunger. rlzhe swing ofthe lever-,Bitten its fuleium 33, if

lmade twice as great will give twice the 4movement to th'e hollow plunger and at the same time the direct outward movement of Il. 'In a carbureter, a carbureting chamber or lcasing-havin-g an ai-r opening through a Wall thereof," said` opening being of uniform width! tliroughout'its length', slidable closure'meansl'itting oversaidopening, a rod tomove saidfclosur'e means to regulate the l vsize of said opening, meansl adapted to be '.set to limit the closing.- movement of said rod," a pivoted lever, -nieans connecting said tancesfromthe pivot of said lever, a fuel feed nozzle within said carbureting chamber,

means movable lengthwise of said nozzle to open'the, same at a uniform rate, means op,- eratively connecting said nozzle-opening `means with said leverfand means adapted to be set to limit'the closing movement of said. nozzle-opening means with respect to:

said lever. e

2..,In a'carbureter, a carburetiiig chamber having oppositely disposed air openings through the walls thereof, said air openings each being of a unifoiin width throughout `it-s length, a. piston. sleeve fitting within said chamber, a rod to move saidl sleeve to simultaneously regulate the size of said openings, means adapted to be set to limit the closing movement of said sleeve, a piv ot'ed lever, means connecting said lever androd adjustably at different distances from the pivot vof said lever, a fuel feed nozzle between the airopenings of the carburet'ing chamber, a plunger within said nozzle adapt- 'ed to open the same at a uniform rate per .unit ofv movement of, said plunger, means operatively connecting. said plunger with said lever,an d mea-ns adapted to be set-to. 4limit the closing. movement-of said plunger with respect to said lever.

' 48. In a carbureter, a carbureting chamber oi' vcasing having oppositely disposed air openings through the walls thereof, se"

"openings being of a uniform width througnoutjtheir length, slidable closure means fitting over 'said openings, a rod to move said closure means to simultaneously regulate the size of said openings, means adapted to be set to` limit theclosing movement of said rod, a pivoted lever, meansconnecting said lever'androdadjustably at differentdistances from. the pivot of saidlever, a fuel feed nozzle between the air openings of the cafi'bureting chamber, a plunger within said vnozzle adapted to open the saine at a unis forinrate per unitlof movement ofsaid l n "lever and lrodadjustably at diiferent dision 1 iio Countyof Los Angeles and State of Celli fornia, this 3rd day of September 1910.

inf/wis,- BARNARD,

plunger, means operatively connecting said plunger with said lever, and means adapted to be set to limit the Closing movement of said plunger With respect to said lever.

In estimony .whereof I have hereunto Signed my name in the presence Of two subscrihing Witnesses at Los Angeles, in' the Witnesses: A

ALBERT H. MERRILL, LILLAN YOUNG. 

